From a4ea331f3a72e18195db2dfee4e274bbfde297b1 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 7 Feb 2002 01:05:52 +0000
Subject: [PATCH] Added extensions code submitted by Yefrei.

---
 src/osgPlugins/flt/Record.cpp | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/osgPlugins/flt/Record.cpp b/src/osgPlugins/flt/Record.cpp
index 18c499e47..b382d4a22 100644
--- a/src/osgPlugins/flt/Record.cpp
+++ b/src/osgPlugins/flt/Record.cpp
@@ -153,13 +153,23 @@ void PrimNodeRecord::removeAllChildren()
 
 bool PrimNodeRecord::readExtensionLevel(Input& fr)
 {
+    int extensionState = 1;
     Record* pRec;
 
     while (pRec=fr.readCreateRecord(_pFltFile))
     {
-        if (pRec->isOfType(POP_EXTENSION_OP))
-            return true;
-        // ignore extensions for now
+        if (pRec->isOfType(PUSH_EXTENSION_OP))
+        {
+            ++extensionState;
+        }
+        else if (pRec->isOfType(POP_EXTENSION_OP))
+        {
+            --extensionState;
+            if ( !extensionState )  // PUSH'es and POP's have cancelled out
+            {
+                return true;
+            }
+        }
     }
     return false;
 }